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Finding the Fourth Proportional to 85,638.90, 118,181.85 and 47,401.05

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Solution

The fourth proportional to 85,638.90, 118,181.85 and 47,401.05 is: 65,413.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,638.90 : 118,181.85 = 47,401.05 : x
  2. Step 2: Convert to fraction form
    85,638.90/118,181.85 = 47,401.05/x
  3. Step 3: Cross multiply
    85,638.90x = 118,181.85 × 47,401.05
  4. Step 4: Simplify right side
    85,638.90x = 5,601,943,780.94
  5. Step 5: Solve for x
    x = 5,601,943,780.94/85,638.90
  6. Step 6: Final answer
    x = 65,413.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.